Mindray BeneHeart D3, Operator'S Manual

Page: 97 / 186

13-1
13
NIBP
13.1 Introduction
Automatic non-invasive blood pressure monitoring uses the oscillometric method of measurement. It is intended for
adult, pediatric and neonatal patients. To understand how this method works, we’ll compare it to the auscultative
method.
With auscultation, the clinician listens to the blood pressure and determines the systolic and diastolic pressures. The
mean pressure can then be calculated with reference to these pressures as long as the arterial pressure curve is normal.
Since the equipment cannot hear the blood pressure, it measures cuff pressure oscillation amplitudes. Oscillations are
caused by blood pressure pulses against the cuff. The oscillation with the greatest amplitude is the mean pressure. Once
the mean pressure is determined, the systolic and diastolic pressures are calculated with reference to the mean.
Simply stated, auscultation measures systolic and diastolic pressures and the mean pressure is calculated. The
oscillometric method measures the mean pressure and determines the systolic and diastolic pressures.
As specified in IEC 60601-2-30/EN60601-2-30, NIBP monitoring is allowed while an electrosurgical operation is in
progress or a defibrillation shock is being delivered.
NIBP diagnostic significance must be decided by the doctor who performs the measurement.
NOTE
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Blood pressure measurements determined with this device are equivalent to those obtained by a trained
observer using the cuff/stethoscope auscultatory method or an intra-arterial blood pressure measurement
device, within the limits prescribed by the American National Standard, Manual, electronic, or automated
sphygmomanometers.
13.2 Safety
WARNING
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Be sure to select the correct patient category setting for your patient before measurement. Do not apply the
higher adult settings for pediatric or neonatal patients. Otherwise it may present a safety hazard.
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Do not measure NIBP on patients with sickle-cell disease or any condition where skin damage has occurred
or is expected.
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Use clinical judgment to determine whether to perform frequent unattended blood pressure measurements
on patients with severe blood clotting disorders because of the risk of hematoma in the limb fitted with the
cuff.